/*
 * Copyright 2017 The Closure Compiler Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.javascript.jscomp;

import java.io.Serializable;

/**
 * Id generator used in CrossModuleMotion.
 *
 * @author nicksantos@google.com (Nick Santos)
 */
class IdGenerator implements Serializable {

  /**
   * Ids for cross-module method stubbing, so that each method has
   * a unique id.
   */
  private int currentId = 0;

  /**
   * Returns whether we've generated any new ids.
   */
  boolean hasGeneratedAnyIds() {
    return currentId != 0;
  }

  /**
   * Creates a new id for stubbing a method.
   */
  int newId() {
    return currentId++;
  }
}
